Prepare the SOC Arduino

[hegyibalint]

To test the implementation, we need the Arduino which can act as a gateway between S88 and the Raspberry Pi.

• [ ] Rewrite the code in terms of communication, to use UART instead of Ethernet
• [ ] Wire the Arduino with it's Raspberry Pi

This is a child issue of #45

[zsoltmazlo]

We decided to send the raw binary data over UART as a byte stream with the format below: [header] [data3 2 1 0] [data 3 2 1 0 repeated] [header]...

For exp: [0xFF...0xFF (7 times) 0xAA] [0 0 10 0] [0 0 10 0] which means that only segment number 13 is occupied.